I assume that you are asking about the Rite of Benediction. The Benediction is used in the Presence of the Blessed Sacrament. Usually in a Catholic Benediction, mostly Latin prayers are recited, and songs that pertain to the Eucharist, such as "Tantum Ergo" composed by St. Thomas Aquinas, are used. The priest or clerical celebrant may form a procession around the walls of the Church, otherwise, the Blessed Sacrament is adored in the focal point of the Altar. Prayers and Chants are recited until the Blessed Sacrament is placed into Reposition, inside the Tabernacle.